Intro to Radio Wave Propagation - EVARC - Estes Valley Amateur PDF
Preview Intro to Radio Wave Propagation - EVARC - Estes Valley Amateur
Propagation: The science and study of radio wave reflection, refraction, diffraction, absorption, polarization, and scattering. Hamvention® Reuben Meeks, W8GUC Electronics, R.F. Engineer, Frank J. Beafore WS8B – Technical Specialist, ARRL © 2011 WS8B Measurement Convention: • Meter • Centimeter • Millimeter • Hertz - Hz • Kilohertz – KHz • Megahertz – MHz • Gigahertz – GHz © 2011 WS8B Propagation © 2011 WS8B Radio Wave Propagation • Radio propagation is the behavior of radio waves when they are transmitted, or propagated from one point on the Earth to another, or into various parts of the atmosphere. • Like light waves, radio waves are affected by the phenomena of • reflection refraction diffraction absorption polarization scattering © 2011 WS8B Early History • 1850 – Fazio & Foucalt – Speed of Light • 1852 - Gustav Kirchoff – Speed of Electricity • 1853 – James Maxwell – Light = Electricity • 1896 – Aleksandr Popov – Wireless Experiments • 1899 – Nikola Tesla – First Antenna Theory • 1901 – G. Marconi First Transatlantic Signal © 2010 WS8B Nikola Tesla © 2010 WS8B The Tesla Coil Please don’t try this at home. © 2010 WS8B Tesla Coil – Plasma Discharge © 2010 WS8B Marconi, Father of Radio © 2010 WS8B Antenna Definition • “The antenna launches energy from a transmitter into space or pulls it in from a passing wave for a receiver. Without a suitable, properly installed antenna, the best transmitter and receiver are useless”. Dr, John Kraus-W8JK, Professor Emeritus, Ohio State University, Columbus, Ohio. © 2010 WS8B
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